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Green-up dates in the Tibetan Plateau have continuously advanced from 1982 to 2011

Geli Zhang, Yangjian Zhang, Jinwei Dong, Xiangming Xiao
2013 Proceedings of the National Academy of Sciences of the United States of America  
Nelson for comments on earlier drafts. This work was supported by the Hundred Talents  ...  Fig. 1 . 1 Interannual variations in vegetation SOS from 1982 to 2011 based on the GIMMS (1982-2006), SPOT-VGT (1998-2011), and MODIS (2000-2011) NDVI datasets in the whole Tibetan Plateau region (A),  ...  Variations in the vegetation SOS based on the three NDVI datasets were significantly different (Fig. 1A) .  ... 
doi:10.1073/pnas.1210423110 pmid:23440201 pmcid:PMC3600495 fatcat:mld2pdxkyjflnf7skwmm6wjzba

Assessment of Vegetation Phenological Extractions Derived From Three Satellite-Derived Vegetation Indices Based on Different Extraction Algorithms Over the Tibetan Plateau

Chunchun An, Zhi Dong, Hongli Li, Wentai Zhao, Hailiang Chen
2021 Frontiers in Environmental Science  
Also, the temporal and spatial stabilities of phenological metrics based on SA using EVI or NDPI were more stable than those from others.  ...  that evaluate the impact of different vegetation indices on phenological metrics extraction.  ...  Dynamics of the Climatic Impacts on greenup Date in the Tibetan Plateau. Spatial and Temporal Variation in Primary Productivity (NDVI) of Environ.  ... 
doi:10.3389/fenvs.2021.794189 fatcat:e7e552sbindyrhscudgx4e5qmy

Responses of net primary productivity to phenological dynamics in the Tibetan Plateau, China

Siyuan Wang, Bing Zhang, Qichun Yang, Guangsheng Chen, Bojuan Yang, Linlin Lu, Ming Shen, Yaoyao Peng
2017 Agricultural and Forest Meteorology  
In this study, we intend to quantifying the temporal trends and spatial variations of vegetation phenology and NPP across the Tibetan Plateau by calibrating and analyzing time series of the MODIS-derived  ...  normalized difference vegetation index (NDVI) during 2002-2012, and examining the mechanisms of vegetation NPP response to phenological dynamics over the plateau.  ...  The authors are very grateful to Prof. Hanqin Tian and the anonymous reviewers for their constructive and critical comments on this manuscript.  ... 
doi:10.1016/j.agrformet.2016.08.020 fatcat:dya6hxg7rzajzitow2joi7qx4y

Mapping Plant Functional Types over Broad Mountainous Regions: A Hierarchical Soft Time-Space Classification Applied to the Tibetan Plateau

Danlu Cai, Yanning Guan, Shan Guo, Chunyan Zhang, Klaus Fraedrich
2014 Remote Sensing  
information with topography: (i) Temporal variability: a Fourier transform of a vegetation index (MODIS NDVI, 2006 to 2010 .  ...  Applicability and effectiveness is tested for the eastern Tibetan Plateau. A classification nomenclature is determined from temporally stable pixels in the MCD12Q1 time series.  ...  Figure 5 . 5 Comparison of (a) phenological hierarchical classification and (b) MODIS 2007 PFT for eastern Tibetan Plateau.  ... 
doi:10.3390/rs6043511 fatcat:ozf7hhk6wjerfn42vasjqox55y

Performance Evaluation of Long NDVI Timeseries from AVHRR, MODIS and Landsat Sensors over Landslide-Prone Locations in Qinghai-Tibetan Plateau

Payam Sajadi, Yan-Fang Sang, Mehdi Gholamnia, Stefania Bonafoni, Luca Brocca, Biswajeet Pradhan, Amit Singh
2021 Remote Sensing  
The existence of several NDVI products in Qinghai-Tibetan Plateau (QTP) makes it challenging to identify the ideal sensor for vegetation monitoring as an important factor for landslide detection studies  ...  A pixel-based analysis of the NDVI time series was carried out to compare the performances of five NDVI products, including ETM+, OLI, MODIS Series, and AVHRR sensors in QTP.  ...  (NDVI product) for the entire Tibetan Plateau at 30 m spatial resolution for 1990-2018  ... 
doi:10.3390/rs13163172 fatcat:3nuoprcsa5bq3d3kagd6nbxety

Precipitation Dominates the Relative Contributions of Climate Factors to Grasslands Spring Phenology on the Tibetan Plateau

Min Cheng, Ying Wang, Jinxia Zhu, Yi Pan
2022 Remote Sensing  
However, the relative contributions of each factor and their underlying combined effect on vegetation phenology are much less clear, especially for the grassland of the Tibetan Plateau To quantify the  ...  contribution of each factor and the potential interactions, we conducted redundancy analysis for grasslands spring phenology on the Tibetan Plateau during 2000–2017.  ...  Acknowledgments: We thank the Land Processes Distributed Active Archive Center for providing MODIS satellite data.  ... 
doi:10.3390/rs14030517 fatcat:g3itoklibzarjeytbtzjiufl3i

Soil Moisture Retrievals Using Multi-Temporal Sentinel-1 Data over Nagqu Region of Tibetan Plateau

Mengying Yang, Hongquan Wang, Cheng Tong, Luyao Zhu, Xiaodong Deng, Jinsong Deng, Ke Wang
2021 Remote Sensing  
Afterward, the vegetation water content (VWC) in the WCM is calculated from the daily MODIS NDVI data obtained by temporal interpolation.  ...  This paper presents an approach for retrieval of soil moisture in Nagqu region of Tibetan Plateau using VV-polarized Sentinel-1 SAR and MODIS optical data, by coupling the semi-empirical Oh-2004 model  ...  Acknowledgments: The authors thank Kun Yang for collecting and providing the soil moisture ground measurements data over the Tibetan Plateau via the International Soil Moisture Network, and the anonymous  ... 
doi:10.3390/rs13101913 fatcat:65a5hemsfjbunjrucibrwrbqve

Effects of climate change on the growing season of alpine grassland in Northern Tibet, China

Xiaoke Zhang, Xindong Du, Jiangtao Hong, Ziyin Du, Xuyang Lu, Xiaodan Wang
2020 Global Ecology and Conservation  
We investigated spatial-temporal variations in the growing season of 15 alpine grassland in Northern Tibet, as determined by TIMESAT model employing MODIS NDVI 16 data.  ...  These results could contribute to the research on plant phenology and climate change 24 from a different perspective. 25  ...  Spatiotemporal variation in alpine grassland phenology in 308 the Qinghai-Tibetan Plateau from 1999 to 2009. Chin. Sci.  ... 
doi:10.1016/j.gecco.2020.e01126 fatcat:ykll3inb4zeozfumxb2zxsveui

Discrepancies in vegetation phenology trends and shift patterns in different climatic zones in middle and eastern Eurasia between 1982 and 2015

Yaobin Li, Yuandong Zhang, Fengxue Gu, Shirong Liu
2019 Ecology and Evolution  
In this study, using the Normalized Difference Vegetation Index dataset from 1982 to 2015, we extracted start date of vegetation growing season (SOS), end date of vegetation growing season (EOS), and length  ...  Changes in vegetation phenology directly reflect the response of vegetation growth to climate change.  ...  Remote sensing, in another way, provides continuously spatial and temporal informations on a variety of surface vegetation at regional or global scales, and numerous studies have investigated the variations  ... 
doi:10.1002/ece3.5408 pmid:31410270 pmcid:PMC6686356 fatcat:elj24o2atzghrn2egg3lilzopu

Temporal Pattern Analysis of Cropland Phenology in Shandong Province of China Based on Two Long-Sequence Remote Sensing Data

Shilong Ren, Shuai An
2021 Remote Sensing  
In this study, taking the typical cropland in the Shandong province of China as the target, we analyzed the temporal pattern of the Normalized Difference Vegetation Index (NDVI) and phenology metrics (  ...  However, most studies have focused on phenology investigation on natural vegetation, and only a few have explored phenology variation of cropland.  ...  Remote Sensing Data and Phenology Extraction Two long-term NDVI datasets were used to extract vegetation phenology and compare their performances in phenological analysis.  ... 
doi:10.3390/rs13204071 fatcat:tuksd6ere5finbihfzvxie7qra

Start of vegetation growing season on the Tibetan Plateau inferred from multiple methods based on GIMMS and SPOT NDVI data

Mingjun Ding, Lanhui Li, Yili Zhang, Xiaomin Sun, Linshan Liu, Jungang Gao, Zhaofeng Wang, Yingnian Li
2015 Journal of Geographical Sciences  
In this study, we have used four methods to investigate the start of the growing season (SGS) on the Tibetan Plateau (TP) from 1982 to 2012, using Normalized Difference Vegetation Index (NDVI) data obtained  ...  SGS values estimated using the four methods show similar spatial patterns along latitudinal or altitudinal gradients, but with significant variations in the SGS dates.  ...  Therefore, smoothing methods are widely used for the extraction of phenological information.  ... 
doi:10.1007/s11442-015-1158-y fatcat:ppxu6d2ugfe77iuad2j7zf6jdu

Phenology shift from 1989 to 2008 on the Tibetan Plateau: an analysis with a process-based soil physical model and remote sensing data

Zhenong Jin, Qianlai Zhuang, Jin-Sheng He, Tianxiang Luo, Yue Shi
2013 Climatic Change  
The method proposed and empirical relations established between phenology and soil physical conditions for Alpine ecosystems on the Tibetan plateau could also be applicable for other cold regions.  ...  Here we examine how the spatiotemporal pattern of satellite-derived phenology is related to soil physical conditions simulated with a soil physical model on the Tibetan Plateau for the period 1989-2008  ...  ), Department of Energy (DE-FG02-08ER64599), and the NSF Division of Information & Intelligent Systems (NSF-1028291).  ... 
doi:10.1007/s10584-013-0722-7 fatcat:4mczlj2ykbcvdk5kp4yqq5khtq

Spatial and temporal variations in the end date of the vegetation growing season throughout the Qinghai–Tibetan Plateau from 1982 to 2011

Mingliang Che, Baozhang Chen, John L. Innes, Guangyu Wang, Xianming Dou, Tianmo Zhou, Huifang Zhang, Jianwu Yan, Guang Xu, Hongwei Zhao
2014 Agricultural and Forest Meteorology  
The spatial and temporal variations in the end date of the vegetation growing season (EGS) and their relationships with climate factors across the Qinghai-Tibetan Plateau yet have not been well researched  ...  In this study, we used the rate of the change in the curvature of the S-curve function which integrated a logistic function and an asymmetric Gaussian function and showed a better performance for fitting  ...  Pinzon of NASA GSFC for making available the GIMMS NDVI3g data set. And, we also thank Dr. Nicholas C. Coops for his valuable comments and suggestions which have helped us to improve the manuscript.  ... 
doi:10.1016/j.agrformet.2014.01.004 fatcat:6k4vjkutubeuxistphhcwcgafu

Variability and climate change trend in vegetation phenology of recent decades in the Greater Khingan Mountain area, Northeastern China

Huan Tang, Zhenwang Li, Zhiliang Zhu, Baorui Chen, Baohui Zhang, Xiaoping Xin
2015 Remote Sensing  
The response of the variation in phenology with climatic factors was also analyzed.  ...  difference vegetation index version 3 (NDVI3g) dataset from the years 1982-2012.  ...  Acknowledgments We gratefully acknowledge Ruirui Yan whose comments lead to significant improvements in this manuscript.  ... 
doi:10.3390/rs70911914 fatcat:zk4mdwxznzc5lfcp3jjnc53r4e

A Landsat-based vegetation trend product of the Tibetan Plateau for the time-period 1990–2018

Fabian Ewald Fassnacht, Christopher Schiller, Teja Kattenborn, Xinquan Zhao, Jiapeng Qu
2019 Scientific Data  
Here, we present vegetation trend products for the entire Tibetan Plateau at a spatial resolution of 30 m for the time period 1990-2018.  ...  Most existing vegetation trend products covering the entire Tibetan Plateau have a coarse spatial grain and cover short temporal ranges.  ...  To compare the Landsat-based NDVI mosaics with the MODIS-based NDVI mosaics we first created a spatial grid sized 0.25° × 0.25° covering the complete Tibetan Plateau.  ... 
doi:10.1038/s41597-019-0075-9 pmid:31148554 pmcid:PMC6544617 fatcat:isusg4plnveappmgp6uwewuw7e
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